By Kirk White

last modified: August 29, 2012

These files are used to construct estimates of concrete demand density in 2007.

city_county_07_areas_tabB1.csv -- Table B-1. Counties -- Area and Population, 
				  from Census Bureau's City County Data Book.
				  Contains areas and populations for all U.S. counties,
				  as well as state and county FIPS codes and names.
				  Downloaded August 21, 2012.
				  Notes at bottom of table describe sources in detail.

city_county_07_areas.csv       -- Extract from Table B-1.  Just has State & county FIPS code,
				  County name, State postal code, and area in square miles.


